基于模块化设计的成本控制研究

以模块化设计为基础，以变型设计为研究对象，将成本企划思想与模块化产品规划融为一体，提出了以基型模块成本为标准成本．通过变型模块与基型模块的差异估算变型模块成本的思路和方法．以此为基础，研究了模块化成本控制的主要内容．首先将需求转为产品特征，确定需求产品的结构；然后针对需求产品的设计成本，构建了成本估算模型，分析了影响成本的主要因素及其相互关系；最后建立了以模块为对象的成本控制模型．并验证了模型的有效性．     

基于产品动态模型的智能快速响应设计理论和方法研究

文中将产品动态模型应用于快速响应变型设计中,研究了快速响应变型设计智能化理论和方法,提出了采用规则推理和实例推理相结合的混合推理策略;并针对设计的过程性,将变型设计分为概念变型设计、装配变型设计和产品定义变型设计;最后分析了基于产品动态模型的智能变型设计过程。     

用于变型设计的派生式CAD方法

本文将CAPP方法移植到CAD技术中，实现了用于变型设计方案的派生式CAD方法，讨论了派生式CAD在功能变型设计和结构变型设计的应用。文中详细比较了派生式CAPP与产品变型设计的工作过程，给出了基于相似性原理的产品分类编码方法，提供了一套相对独立的产品变型设计特性代码操作机制。     

采用双迭片压电敏感元件的声压梯度水听器

介绍一种采用双选片压电敏感元件的声压梯度水听器．描述了这种水听器的结构设计方法以及实测的指向性、接收灵敏度特性，提出几种可能的变型设计．     

PDM环境下基于实例推理的变型设计技术研究

针对建立实例库时存在的问题,对基于实例推理的变型设计进行了研究,提出了在PDM环境下建立实例库的方法.分析了实例推理的一般过程,提出了一种基于实例推理的变型设计求解模型,在此基础上, 以汽车产品为例,提出了一种变型设计的检索方法,为实现汽车产品的变型设计奠定了基础.     

复杂产品开发网络中变型设计节点方案评价

当修改配置产品的某个模块后,如何快速查找可能需要修改的模块是产品配置研究中的一个热点问题.为此提出一种复杂产品开发网络中变型设计节点方案评价方法.首先使用评价指标,即节点集介数、信息度和网络聚类系数综合描述变型设计节点集的网络特性;然后结合变型设计的时间与资源约束条件,使用离散粒子群算法优化变型设计节点配置,使得变型设计节点方案能满足控制变型设计传播需求.最后通过某型号真空吸尘器的产品变型设计,验证了文中方法的有效性.对于大规模定制模式下的复杂产品开发网络中,有针对性地选取变型设计节点具有重要意义.     

基于参数化技术的装配件变型设计

为了满足客户对产品个性化需求,提出了基于参数化技术的装配件变型设计方法。研究基于参数化技术的装配件变型设计原理,建立了零件参数化模型,并对其参数进行分析,根据装配件各零件之间的配合关系,组建装配件信息化模型,以SolidWorks三维造型软件为设计环境,以VC++为工具开发出装配件变型设计原型系统,实现了装配件变型设计。最后,以垃圾破碎机为例,验证了该方法的可行性。     

支持概念及装配建模的智能变型设计系统框架

概述了目前计算机辅助变型设计中存在的问题,将实例推理技术（ＣＢＲ）应用于变型设计,提出了一个支持概念建模和装配建模的智能变型设计系统框架,研究了这种智能变型设计的设计过程理论,并对系统的关键技术－实例的表示和了详细的研究。     

基于实例的多推理机合作变型设计系统

产品变型设计的基本思想就是通过改进已有的系列产品或模块来适应新的设计需求.针对变型设计的基本特点,提出了以基于实例的推理为基础,综合运用规则推理和约束满足方法来完成产品的变型设计活动.结合所开发的“细纱机模块化变型设计系统”,从知识表达模式、推理流程等方面详细讨论了以基于实例的推理为核心方法的多推理机合作变型设计系统的实现.     

结构-视图模型下零件可变型设计方法

提出基于功能结构一结构视图模型的零件族建模方法,将零件变型设计的对象层次定义到有一定工程语义、表达工程功能的结构,将零件描述为由功能结构以一定的组合关系构成的可扩展网络．组成零件的功能结构通过施加空间布局约束和拼接约束建立零件族模型．通过修改参数尺寸可以实现零件大小的变化;通过对功能结构的修改或替换达到零件实例结构的变型和变异;通过提高零件变型对象的层次实现零件功能结构的变异．     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

Call for papers Special issue on Modeling and control technologies for civil,energy,and power systems

正The control of civil,energy,and power systems presents significant new challenges for modeling and control theory.The purpose of this special issue is to provide a forum for researchers and practical engineers to discuss the recent advances in modeling and control technology development for civil,energy,and power systems.Prospective authors are invited to submit their original contributions with the focus on theory or applications of modeling,control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate and promote academic exchange between Chinese and foreign scientists everywhere.